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47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
import json
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from typing import Optional
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from langchain.callbacks.manager import (
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AsyncCallbackManagerForToolRun,
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CallbackManagerForToolRun,
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)
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from langchain.tools.base import BaseTool
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from langchain.utilities.graphql import GraphQLAPIWrapper
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class BaseGraphQLTool(BaseTool):
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"""Base tool for querying a GraphQL API."""
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graphql_wrapper: GraphQLAPIWrapper
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name = "query_graphql"
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description = """\
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Input to this tool is a detailed and correct GraphQL query, output is a result from the API.
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If the query is not correct, an error message will be returned.
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If an error is returned with 'Bad request' in it, rewrite the query and try again.
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If an error is returned with 'Unauthorized' in it, do not try again, but tell the user to change their authentication.
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Example Input: query {{ allUsers {{ id, name, email }} }}\
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""" # noqa: E501
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class Config:
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"""Configuration for this pydantic object."""
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arbitrary_types_allowed = True
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def _run(
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self,
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tool_input: str,
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run_manager: Optional[CallbackManagerForToolRun] = None,
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) -> str:
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result = self.graphql_wrapper.run(tool_input)
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return json.dumps(result, indent=2)
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async def _arun(
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self,
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tool_input: str,
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run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
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) -> str:
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"""Use the Graphql tool asynchronously."""
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raise NotImplementedError("GraphQLAPIWrapper does not support async")
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